Font for superscript and subscript

[Asadali92]

I'm using 12 size font in an entire document but superscript and subscript for this size font are too small, client want me to increase its size by atleast 2 more points. 

My question is, is there a way to increase the size automattically in entire document for superscript and subscript? 

See attached

[jmlevy · Accepted solution]

Go to preferences > advanced type and increase these values